Using sessions in Ratpack - `0.9.17` + `0.9.18-SNAPSHOT`

Example1.java

import ratpack.exec.Operation;
import ratpack.exec.Promise;
import ratpack.guice.Guice;
import ratpack.handling.Context;
import ratpack.session.Session;
import ratpack.session.SessionKey;
import ratpack.session.SessionModule;
import ratpack.test.embed.EmbeddedApp;

import static org.junit.Assert.assertEquals;

public class Example1 {
  public static void main(String[] args) throws Exception {
    EmbeddedApp.of(s -> s
      .registry(
        Guice.registry(b -> b.module(SessionModule.class)))
      .handlers(c -> c
          .get(":username", ctx -> {
            String username = ctx.getPathTokens().get("username");
            setSessionValue(ctx, "username", username)
              .then(() -> ctx.getResponse().send("Set " + username));
          })
          .all(ctx -> {
            getSessionValue(ctx, "username")
              .map(username ->
                username == null ? "anon" : username)
              .then(username ->
                ctx.getResponse()
                  .send("Welcome, " + username + "!"));
          })
      ))
      .test(testClient -> {
        assertEquals("Welcome, anon!", testClient.getText());
        assertEquals("set ratpack", testClient.getText("/ratpack"));
        assertEquals("Welcome, ratpack!", testClient.getText());
      });
  }

  private static Operation setSessionValue(Context ctx, String keyName, String value) {
    return ctx.get(Session.class).getData().operation(sessionData -> {
      SessionKey<String> key = SessionKey.of(keyName, String.class);
      sessionData.set(key, value);
    });
  }

  private static Promise<String> getSessionValue(Context ctx, String keyName) {
    return ctx.get(Session.class).getData().map(sessionData -> {
      SessionKey<String> key = SessionKey.of(keyName, String.class);
      return sessionData.get(key).orElse(null);
    });
  }
}

Example2.java

/*
 * Copyright 2015 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import ratpack.exec.Operation;
import ratpack.exec.Promise;
import ratpack.guice.Guice;
import ratpack.handling.Context;
import ratpack.session.Session;
import ratpack.session.SessionKey;
import ratpack.session.SessionModule;
import ratpack.test.embed.EmbeddedApp;

import static org.junit.Assert.assertEquals;

public class Example2 {
  public static void main(String[] args) throws Exception {
    EmbeddedApp.of(s -> s
      .registry(
        Guice.registry(b -> b.module(SessionModule.class)))
      .handlers(c -> c
          .get(":username", ctx -> {
            String username = ctx.getPathTokens().get("username");
            ctx.render(
              setSessionValue(ctx, "username", username)
              .map(() -> "Set " + username));
          })
          .all(ctx -> {
            ctx.render(
              getSessionValue(ctx, "username")
              .map(username ->
                username == null ? "anon" : username)
              .map(username -> "Welcome, " + username + "!"));
          })
      ))
      .test(testClient -> {
        assertEquals("Welcome, anon!", testClient.getText());
        assertEquals("Set ratpack", testClient.getText("/ratpack"));
        assertEquals("Welcome, ratpack!", testClient.getText());
      });
  }

  private static Operation setSessionValue(Context ctx, String keyName, String value) {
    return ctx.get(Session.class).getData().operation(sessionData -> {
      SessionKey<String> key = SessionKey.of(keyName, String.class);
      sessionData.set(key, value);
    });
  }

  private static Promise<String> getSessionValue(Context ctx, String keyName) {
    return ctx.get(Session.class).getData().map(sessionData -> {
      SessionKey<String> key = SessionKey.of(keyName, String.class);
      return sessionData.get(key).orElse(null);
    });
  }
}